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基于FFT的直扩系统中窄带干扰抑制技术研究与实现
引用本文:丁法珂.基于FFT的直扩系统中窄带干扰抑制技术研究与实现[J].科学技术与工程,2009,9(10).
作者姓名:丁法珂
作者单位:中国空空导弹研究院,洛阳,471009
摘    要:针对直接序列扩频系统中窄带干扰问题,介绍了基于FFT的干扰抑制算法.根据直接序列扩频信号与窄带干扰信号在频域能量分布不同这一特性,利用快速傅立叶变换实现窄带干扰信号的实时检测和抑制.采用VHDL硬件描述语言对算法进行基于FPGA实现的可综合的描述.最后在硬件测试平台上进行性能测试,结果表明设计能有效抑制直接序列扩频系统中的窄带干扰.

关 键 词:直序扩频系统  窄带干扰  快捷傅立叶变换(Fast  Trans  formee  de  Fourier  FFT)  现场可编程门阵列(Field  Programmable  Gate  Array  FPGA)

Investigation and Implementation of Narrowband Interference Excision in DSSS System Based on FFT
DING Fa-ke.Investigation and Implementation of Narrowband Interference Excision in DSSS System Based on FFT[J].Science Technology and Engineering,2009,9(10).
Authors:DING Fa-ke
Institution:China Airborne Missile Academy;Luoyang 471009;P.R.China
Abstract:To overcome the narrowband interference in the DSSS system, an anti-interference algorithm based on FFT is introduced. The narrowband interference is detected and suppressed by FFT based on its power distribution difference between that and the DSSS signal in frequency domain. And the synthesizable algorithm is implemented by VHDL to achieve in the FPGA. The performance, which is tested in the hardware platform, shows that effective suppression to the narrowband interference can be obtained in the DSSS syst...
Keywords:direct sequence spread spectrum narrowband interference FFT FPGA  
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